解析：首先需要创建一个二叉树节点类，包含值、左子节点和右子节点。然后根据输入的父节点数组构建二叉树。接着遍历二叉树，根据节点的颜色进行相应的运算。最后输出根节点的值。

代码如下：

import java.util.Scanner;

class TreeNode {
    int val;
    TreeNode left;
    TreeNode right;

    TreeNode(int val) {
        this.val = val;
    }
}

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] p = new int[n];
        for (int i = 1; i < n; i++) {
            p[i] = sc.nextInt();
        }
        int[] c = new int[n];
        for (int i = 0; i < n; i++) {
            c[i] = sc.nextInt();
        }
        sc.close();

        TreeNode root = buildTree(p, c);
        System.out.println(root.val);
    }

    public static TreeNode buildTree(int[] p, int[] c) {
        TreeNode root = new TreeNode(1);
        TreeNode node = root;
        for (int i = 2; i <= p.length; i++) {
            if (c[i] == 1) {
                if (node.left == null) {
                    node.left = new TreeNode(p[i]);
                } else {
                    node.right = new TreeNode(p[i]);
                }
                node = node.left; // 如果是红色，则向左子树移动
            } else {
                if (node.right == null) {
                    node.right = new TreeNode(p[i]);
                } else {
                    node.left = new TreeNode(p[i]);
                }
                node = node.right; // 如果是蓝色，则向右子树移动
            }
        }
        return root;
    }
}